The biggest problem of most APS-C cameras is, that that they use the mount and the lenses made for 35mm. Of course, the 50mm equivalent for any format is usuall

The biggest problem of most APS-C cameras is, that that they use the mount and the lenses made for 35mm. Of course, the 50mm equivalent for any format is usually the easiest lens to make cheap and good. A good 35mm equivalent starts getting more expensive. This problem doesn't exist with a system, where all lenses are matched to the sensor size. This becomes very apparent with mFT: the 25mm, like the Olympus 25/1.8 are stunningly good for a very reasonable price.